Craig Mayer, Nick WIlliams, Vojtech Huser
Lister Hill National Center for Biomedical Communications, National Library of Medicine, NIH, Bethesda, MD

See the full regCTG repository at https://github.com/lhncbc/CRI/tree/master/regCTG

To return to the list of conditions and view other reports go to https://lhncbc.github.io/CRI/regCTG/regCTG-condition_report_links.html


Study Counts

Type Study_count
Total_Studies 2256
interventional 1801
Observational 420
Registry 35

Studies over Time

```

Interventional Trials

Intervention Type

intervention_type Study_Count
Drug 774
Behavioral 165
Other 141
Procedure 122
Biological|Drug 92
Drug|placebo 79
Biological 61
Device 59
Drug|Procedure 39
Drug|Other 22
Dietary Supplement 19
Behavioral|Other 18
Biological|Drug|Other 14
Diagnostic Test 14
Drug|Radiation 13
Other|Procedure 12
Device|Drug 10
Biological|Procedure 9
Dietary Supplement|placebo 9
Device|Drug|Procedure 8
Dietary Supplement|Drug 7
Drug|Procedure|Radiation 7
Radiation 7
Drug|Other|placebo 6
Procedure|Radiation 6
Biological|placebo 5
Device|Other 5
Genetic 5
Combination Product 4
Behavioral|Procedure 3
Biological|Drug|Genetic|Other 3
Biological|Drug|placebo 3
Biological|Other 3
Biological|Radiation 3
Combination Product|Drug 3
Dietary Supplement|Other 3
Behavioral|Device 2
Behavioral|Other|Procedure 2
Biological|Drug|Genetic|Other|Procedure 2
Biological|Drug|Other|placebo 2
Device|Procedure 2
Dietary Supplement|Drug|placebo 2
Drug|Genetic 2
Drug|Other|Procedure 2
Drug|Other|Procedure|Radiation 2
Drug|Other|Radiation 2
Behavioral|Device|Other 1
Behavioral|Dietary Supplement 1
Behavioral|Drug 1
Behavioral|Drug|placebo 1
Behavioral|Genetic|Other 1
Behavioral|placebo 1
Biological|Drug|Genetic 1
Biological|Drug|Other|Procedure|Radiation 1
Biological|Drug|Procedure 1
Biological|Other|placebo 1
Biological|Other|Procedure 1
Biological|placebo|Procedure 1
Biological|Procedure|Radiation 1
Combination Product|Other|Procedure 1
Device|Radiation 1
Diagnostic Test|Drug 1
Diagnostic Test|Drug|Procedure 1
Diagnostic Test|Other 1
Dietary Supplement|Drug|Other 1
Dietary Supplement|Genetic|Other 1
Dietary Supplement|Genetic|Other|Procedure 1
Dietary Supplement|Other|Procedure 1
Dietary Supplement|Other|Procedure|Radiation 1
Drug|Genetic|Other|Procedure 1
Drug|placebo|Procedure 1
Other|placebo 1
Other|Procedure|Radiation 1
Other|Radiation 1

Count of Studies by Intervention (normalized and mapped)

Interventions over Time

Weekly studies for each intervention

Studies by Country

Country Study_Count
United States 611
China 118
NA 114
France 109
Spain 59
Canada 57
United Kingdom 50
Italy 49
Korea, Republic of 49
Germany 41
Japan 36
Denmark 35
Netherlands 35
United States|Canada 32
Norway 19
Belgium 14
Taiwan 13
Hong Kong 12
Greece 11
Brazil 10
Israel 10
Australia 9
Sweden 9
Switzerland 9
United States|Puerto Rico 8
Poland 7
Singapore 7
Egypt 6
Austria 5
Argentina 4
Ireland 4
Turkey 4
Belgium|Germany 3
Belgium|Spain 3
Czechia 3
Denmark|Norway|Sweden 3
Finland 3
Romania 3
United States|Australia 3
United States|Germany 3
Australia|New Zealand 2
Bulgaria 2
Czech Republic 2
Denmark|Sweden 2
Germany|Switzerland 2
India 2
Iran, Islamic Republic of 2
Russian Federation 2
Thailand 2
United States|Italy 2
United States|Netherlands 2
United States|United Kingdom 2
Argentina|Australia|Austria|Belgium|Brazil|France|Germany|Greece|Hong Kong|Israel|Italy|Mexico|Poland|Thailand 1
Argentina|Australia|Austria|Brazil|Bulgaria|Czechia|Denmark|Estonia|France|Germany|Hungary|Ireland|Italy|Latvia|Lithuania|Netherlands|Poland|Portugal|Romania|Russian Federation|Slovakia|Spain|Sweden|Ukraine|United Kingdom 1
Argentina|Brazil|India|Spain|Ukraine 1
Australia|Austria|Brazil|United States|Canada|China|Czech Republic|Denmark|Finland|France|Germany|Guatemala|Hong Kong|Hungary|Ireland|Israel|Italy|Korea, Republic of|Mexico|New Zealand|Norway|Panama|Portugal|Puerto Rico|Russian Federation|South Africa|Spain|Sweden|Switzerland|Taiwan|Thailand|Turkey|United Kingdom 1
Australia|Belgium|Brazil|Bulgaria|Croatia|France|Ireland|Italy|Panama|Poland|Portugal|Romania|Slovakia|Slovenia|Turkey|Ukraine 1
Australia|Belgium|Brazil|Denmark|France|Germany|Italy|Netherlands|Poland|Russian Federation|Spain|United Kingdom 1
Australia|Canada 1
Australia|Canada|Israel|Italy|Korea, Republic of|Netherlands|Singapore|Spain 1
Australia|Canada|Japan 1
Australia|Canada|New Zealand 1
Australia|China|India|Indonesia|Korea, Republic of|Malaysia|New Zealand|Philippines|Saudi Arabia|Singapore|Sri Lanka|Taiwan 1
Australia|Germany|Greece|Netherlands|Spain 1
Australia|Germany|Italy|Korea, Republic of|Russian Federation|Spain|United Kingdom 1
Australia|New Zealand|United Kingdom 1
Australia|United States|Belgium|France|Germany|Italy|Poland|Spain|United Kingdom 1
Austria|Belgium|Canada|Czech Republic|France|Germany|Italy|Spain|United Kingdom 1
Austria|Belgium|Canada|France|Germany|Greece|Italy|Norway|Portugal 1
Austria|Belgium|Egypt|France|Germany|Italy|Netherlands|Russian Federation|South Africa 1
Austria|Belgium|Egypt|France|Germany|Italy|Portugal|Spain|Switzerland|United Kingdom 1
Austria|Belgium|Estonia|France|Germany|Italy|Spain|United Kingdom 1
Austria|Belgium|France|Germany|Greece|Israel|Italy|Poland|Portugal|Romania|Russian Federation|Spain|Ukraine 1
Austria|Belgium|France|Hungary|Spain 1
Austria|Belgium|Netherlands 1
Austria|Bosnia and Herzegovina|Bulgaria|Croatia|Cyprus|Czech Republic|Hungary|Israel|Portugal|Romania|Slovakia|Slovenia|Turkey 1
Austria|Bosnia and Herzegovina|Bulgaria|Croatia|Estonia|Greece|Hungary|Israel|Latvia|Romania|Serbia|Slovakia|Slovenia 1
Austria|Bosnia and Herzegovina|Croatia|Germany|India|Italy|Latvia|Poland|Romania|Russian Federation|Serbia|Sweden|Ukraine 1
Austria|Canada|France 1
Austria|Canada|Greece|Hungary|Italy|Korea, Republic of|Mexico|Netherlands|Poland|Slovenia|Spain|United Kingdom 1
Austria|Czech Republic|France|Germany|Russian Federation|United Kingdom 1
Austria|France|Germany|Hungary|Italy|Spain|United Kingdom 1
Austria|France|Germany|Netherlands|Sweden|Switzerland 1
Austria|France|Spain|United Kingdom 1
Austria|France|United Kingdom 1
Austria|Germany 1
Austria|Germany|Italy|Korea, Republic of|Netherlands|Spain|Sweden|Switzerland|Thailand 1
Austria|Switzerland 1
Belgium|Bulgaria|Cyprus|Czech Republic|Germany|Greece|Hungary|Israel|Poland|Russian Federation|Spain|United Kingdom 1
Belgium|Bulgaria|Germany|Hungary|Latvia|Poland|Romania|Serbia|United Kingdom 1
Belgium|Canada|France 1
Belgium|Czechia 1
Belgium|Czechia|France|Germany|Italy|Japan|Korea, Republic of|Spain|Taiwan|United Kingdom 1
Belgium|Denmark|France|Germany|Hong Kong|Israel|Italy|Korea, Republic of|Portugal|South Africa|Spain|Sweden|Switzerland|Taiwan|Ukraine|United Kingdom 1
Belgium|Egypt|Germany|Hungary|Israel 1
Belgium|France|Germany|Italy|Poland|Spain|United Kingdom 1
Belgium|France|Germany|Italy|Spain 1
Belgium|France|Italy|Portugal 1
Belgium|France|Spain 1
Belgium|Italy|Netherlands|Spain 1
Belgium|Netherlands 1
Belgium|United Kingdom 1
Belgium|United States|Canada|France|Italy|Poland|Spain|United Kingdom 1
Belgium|United States|Spain 1
Brazil|Canada|Chile|China|Croatia|Estonia|Greece|India|Korea, Republic of|Latvia|Lithuania|Malaysia|Mexico|Philippines|Romania|Serbia 1
Brazil|Canada|Cyprus|United Kingdom 1
Canada|Spain 1
Canada|United States|Australia|Belgium|Brazil|China|Finland|France|Germany|Greece|Hong Kong|Hungary|Ireland|Israel|Italy|Korea, Republic of|Mexico|New Zealand|Panama|Poland|Portugal|Russian Federation|Singapore|South Africa|Spain|Switzerland|Taiwan|Thailand|United Kingdom 1
Chile|United States|Argentina|Australia|Austria|Belgium|Brazil|Canada|Czechia|Denmark|France|Germany|Hungary|Israel|Italy|Japan|Korea, Republic of|Mexico|Netherlands|Norway|Poland|Russian Federation|Spain|Taiwan|Turkey|Ukraine|United Kingdom 1
China|Hong Kong|Japan|Singapore|Taiwan 1
China|Hong Kong|Korea, Republic of|Taiwan|Vietnam 1
China|Italy|Serbia|United Kingdom 1
China|Japan 1
China|Korea, Republic of|Thailand 1
Croatia 1
Cuba 1
Cyprus|Greece 1
Cyprus|United Kingdom 1
Czech Republic|Argentina|Australia|Brazil|Bulgaria|China|Germany|Hungary|India|Korea, Republic of|Philippines|Poland|Switzerland|Taiwan|United Kingdom 1
Czechia|France|Germany|Italy|Poland|Russian Federation|Spain|Ukraine|United Kingdom 1
Czechia|France|Israel|Italy|Netherlands|Spain 1
Czechia|France|Russian Federation|Spain|United Kingdom 1
Czechia|United States|Australia|Belgium|Bulgaria|Canada|China|France|Hong Kong|India|Israel|Italy|Korea, Republic of|Latvia|Lithuania|Malaysia|Netherlands|Peru|Philippines|Poland|Romania|Russian Federation|Serbia|Singapore|Slovakia|South Africa|Sweden|Taiwan|United Kingdom 1
Denmark|Germany 1
Denmark|Greece|Norway|Sweden 1
Denmark|Netherlands 1
Denmark|United States|Austria|Belgium|Canada|Germany|Hungary|Poland 1
France|Argentina|Belgium|Bosnia and Herzegovina|Brazil|Denmark|Egypt|Germany|Greece|Italy|Korea, Republic of|Mexico|Netherlands|Poland|Portugal|Russian Federation|Serbia|Slovakia|Slovenia|Spain|Sweden|Turkey|United Kingdom 1
France|Austria|Belgium|Czech Republic|Denmark|Estonia|Finland|Germany|Netherlands|Norway|Portugal|Saudi Arabia|Spain|Sweden|Switzerland 1
France|Belgium|Martinique 1
France|Germany 1
France|Germany|Netherlands 1
France|Hungary|Korea, Republic of|Slovakia|Spain|Taiwan 1
France|Ireland|Israel 1
France|United Kingdom 1
France|United States|Belgium|China|Germany|Hong Kong|Italy|Korea, Republic of|Netherlands|Singapore|Spain|Taiwan|United Kingdom 1
Germany|Argentina|Australia|Austria|Belgium|Bosnia and Herzegovina|Brazil|Bulgaria|Canada|Chile|Colombia|Cyprus|Czech Republic|Hong Kong|Hungary|India|Ireland|Korea, Republic of|Mexico|Norway|Poland|Portugal|Romania|Russian Federation|Serbia|Singapore|Slovakia|South Africa|Spain|Sweden|Taiwan|Thailand|Ukraine|United Kingdom 1
Germany|Israel 1
Germany|Italy|Netherlands|Poland|Spain|United Kingdom 1
Germany|United Kingdom 1
Hungary 1
Hungary|Germany|United States|Argentina|Australia|Belgium|Brazil|Canada|China|Czech Republic|France|Israel|Italy|Japan|Netherlands|Portugal|Spain|Switzerland|Turkey 1
India|United Kingdom 1
Iraq 1
Israel|France|Germany|Greece|United States|Belgium|Canada|Croatia|Finland|Italy|Korea, Republic of|Poland|Puerto Rico|Serbia|Slovakia|Slovenia|South Africa|Spain|Taiwan|United Kingdom 1
Italy|Argentina|Australia|Austria|Belgium|Brazil|Bulgaria|Chile|Czech Republic|Finland|France|Germany|Greece|Hong Kong|Hungary|Korea, Republic of|Mexico|Netherlands|Poland|Romania|Russian Federation|Singapore|Slovakia|South Africa|Spain|Sweden|Taiwan|Turkey|Ukraine|United Kingdom 1
Italy|Switzerland|United Kingdom 1
Jordan 1
Lithuania 1
Malaysia 1
Netherlands|Switzerland 1
Netherlands|United Kingdom 1
New Zealand 1
Norway|Poland 1
Norway|Sweden 1
Philippines 1
Puerto Rico 1
United Kingdom|United States|Belgium|Germany|Netherlands|Spain 1
United States|Argentina|Australia|Austria|Belgium|Brazil|Canada|Chile|China|Czechia|Denmark|France|Germany|Greece|Ireland|Italy|Japan|Netherlands|Norway|Puerto Rico|Romania|Spain|Turkey|United Kingdom 1
United States|Argentina|Australia|Austria|Belgium|Brazil|Chile|Czech Republic|Denmark|Estonia|France|Germany|Greece|Italy|Korea, Republic of|Netherlands|New Zealand|Norway|Poland|Puerto Rico|Romania|Russian Federation|South Africa|Spain|Sweden|Turkey|Ukraine|United Kingdom 1
United States|Argentina|Australia|Austria|Belgium|Brazil|Czechia|Denmark|Finland|France|Germany|Greece|Hungary|India|Israel|Italy|Japan|Korea, Republic of|Netherlands|Portugal|Puerto Rico|Romania|Slovenia|Spain|Sweden|Taiwan 1
United States|Argentina|Australia|Austria|Belgium|Canada|Czechia|Denmark|France|Germany|Hong Kong|Israel|Italy|Japan|Korea, Republic of|Mexico|Netherlands|Poland|Portugal|Russian Federation|Spain|Sweden|Taiwan|Turkey|United Kingdom 1
United States|Argentina|Australia|Brazil|Canada|Chile|Germany|Hungary|Italy|Poland|Portugal|Spain|United Kingdom 1
United States|Argentina|Austria|Brazil|Bulgaria|Canada|Colombia|Greece|Hungary|Italy|Mexico|Peru|Poland|Romania|Russian Federation|Spain|Turkey|Ukraine 1
United States|Argentina|Brazil|Chile|Peru 1
United States|Argentina|Denmark|Italy|Korea, Republic of|Spain|Sweden 1
United States|Argentina|Italy 1
United States|Argentina|Korea, Republic of|Norway|Spain|United Kingdom 1
United States|Australia|Austria|Belgium|Brazil|Canada|France|Germany|Hong Kong|Italy|New Zealand|Portugal|Slovakia|Spain|Sweden|Switzerland|Taiwan|United Kingdom 1
United States|Australia|Austria|Belgium|Canada|Chile|Czechia|Germany|Hong Kong|Israel|Italy|Japan|Korea, Republic of|Singapore|Spain|Taiwan|United Kingdom 1
United States|Australia|Austria|Belgium|Canada|Czech Republic|Egypt|Finland|France|Germany|Hungary|India|Israel|Italy|Latvia|Malta|Philippines|Poland|Russian Federation|Slovakia|South Africa|Spain|Taiwan|Thailand|Turkey|Ukraine|United Kingdom|Vietnam 1
United States|Australia|Austria|Belgium|Canada|Czech Republic|Finland|Hungary|Italy|Netherlands|Spain|United Kingdom 1
United States|Australia|Austria|Belgium|Czech Republic|Finland|France|Germany|Hong Kong|Italy|Netherlands|Norway|Portugal|Slovakia|Sweden|Switzerland|United Kingdom 1
United States|Australia|Austria|Belgium|Czechia|France|Germany|Ireland|Italy|Japan|Spain|Sweden|United Kingdom 1
United States|Australia|Austria|Canada|France|Germany|Greece|Japan|Spain|Sweden 1
United States|Australia|Belgium|Brazil|Canada|Czech Republic|Greece|Korea, Republic of|New Zealand|Poland|Portugal|Romania|Russian Federation|Spain 1
United States|Australia|Belgium|Brazil|Canada|Czechia|France|Germany|Hungary|Italy|Netherlands|New Zealand|Portugal|Slovakia|Spain|Sweden|Switzerland|Taiwan|United Kingdom 1
United States|Australia|Belgium|Bulgaria|Canada|Czechia|France|Hungary|Ireland|Italy|Latvia|Mexico|Poland|Romania|Russian Federation|Slovakia|Ukraine 1
United States|Australia|Belgium|Canada|China|Czechia|France|Germany|Hong Kong|Israel|Italy|Japan|Korea, Republic of|Netherlands|Singapore|Spain 1
United States|Australia|Belgium|Canada|France|Germany|Italy|Japan|Korea, Republic of|Netherlands|Norway|Spain 1
United States|Australia|Belgium|Canada|France|Ireland|Italy|Spain 1
United States|Australia|Belgium|Canada|France|Israel|Italy|Netherlands|Singapore|Spain 1
United States|Australia|Belgium|Canada|Germany|Italy|Spain|United Kingdom 1
United States|Australia|Belgium|Canada|Germany|Netherlands|Spain 1
United States|Australia|Belgium|Canada|Germany|Spain 1
United States|Australia|Belgium|China|France|Germany|Hong Kong|Italy|Japan|Korea, Republic of|Netherlands|Poland|Singapore|Spain|Taiwan|United Kingdom 1
United States|Australia|Belgium|France|Germany|Israel|Italy|Korea, Republic of|New Zealand|Portugal|Singapore|Spain|Taiwan 1
United States|Australia|Belgium|France|Germany|Israel|Italy|New Zealand|Poland|Spain|Switzerland 1
United States|Australia|Belgium|France|Germany|Italy|New Zealand|Romania|Spain|United Kingdom 1
United States|Australia|Belgium|Germany|Italy|Spain|United Kingdom 1
United States|Australia|Belgium|Germany|Spain|Switzerland 1
United States|Australia|Belgium|Poland|Spain 1
United States|Australia|Canada|France|Spain 1
United States|Australia|Canada|Israel|Korea, Republic of 1
United States|Australia|Canada|New Zealand 1
United States|Australia|France|Korea, Republic of|Spain|Switzerland|United Kingdom 1
United States|Australia|India|Russian Federation|Ukraine 1
United States|Australia|Peru|Puerto Rico 1
United States|Austria|Belgium|Canada|China|France|Germany|Italy|Korea, Republic of|Poland|Singapore|Spain|United Kingdom 1
United States|Austria|Belgium|France|Germany|Hungary|Italy|Poland|Russian Federation|Spain 1
United States|Austria|Belgium|France|Germany|Italy|Japan|Netherlands|Spain|United Kingdom 1
United States|Austria|France|Germany|Italy|Puerto Rico 1
United States|Belgium 1
United States|Belgium|Brazil|Canada|Chile|Czechia|Denmark|Finland|Germany|Spain|Ireland|Israel|Italy|Lebanon|Mexico|Netherlands|Norway|Puerto Rico|Russian Federation|Sweden|Thailand|Turkey|United Kingdom 1
United States|Belgium|Canada|France|Italy|Netherlands|Spain 1
United States|Belgium|Canada|Germany|Italy|Lithuania|Netherlands|United Kingdom 1
United States|Belgium|Canada|Germany|Italy|Spain 1
United States|Belgium|Canada|Germany|Netherlands|Spain|United Kingdom 1
United States|Belgium|Canada|Korea, Republic of|Spain|Taiwan 1
United States|Belgium|Czechia|France|Germany|Hong Kong|Hungary|Italy|Japan|Korea, Republic of|Spain|Taiwan|United Kingdom 1
United States|Belgium|France|Italy|Japan|Netherlands|Spain|United Kingdom 1
United States|Belgium|France|Spain 1
United States|Belgium|France|Spain|United Kingdom 1
United States|Belgium|Germany|India|Spain|United Kingdom 1
United States|Belgium|Hungary|Italy|Poland|Romania|Russian Federation|Spain|Ukraine|United Kingdom 1
United States|Belgium|Italy|Netherlands|United Kingdom 1
United States|Belgium|Netherlands|Spain|United Kingdom 1
United States|Belgium|United Kingdom 1
United States|Brazil|Canada|Czech Republic|Hungary|Poland|United Kingdom 1
United States|Bulgaria|Denmark|Georgia|Germany|Portugal|Serbia|Sweden 1
United States|Bulgaria|India|Peru|Puerto Rico|Romania 1
United States|Canada|Estonia|Ireland|Norway|Portugal|Switzerland 1
United States|Canada|France 1
United States|Canada|France|Germany|Israel|Netherlands|Poland|Puerto Rico|Spain|Sweden 1
United States|Canada|France|Germany|Italy|Spain|United Kingdom 1
United States|Canada|France|Italy|Japan|Korea, Republic of|Poland|Spain 1
United States|Canada|Japan|Puerto Rico|Spain 1
United States|Canada|Puerto Rico|South Africa 1
United States|Canada|Spain 1
United States|Czech Republic|Italy 1
United States|France 1
United States|France|Germany|Italy|Russian Federation 1
United States|France|Hong Kong|Hungary|India|Italy|Poland|Russian Federation|Singapore|Spain 1
United States|Germany|Hong Kong|Japan 1
United States|Germany|Hungary|Sweden|Switzerland 1
United States|Germany|Netherlands 1
United States|Iceland|Netherlands|Norway|Poland|Sweden 1
United States|Ireland 1
United States|Israel 1
United States|Italy|Japan|Spain|United Kingdom 1
United States|Italy|United Kingdom 1
United States|Japan 1
United States|Japan|Spain|Ukraine 1
United States|Netherlands|Spain 1
United States|Puerto Rico|South Africa 1
United States|Russian Federation 1
United States|Spain 1
United States|Spain|United Kingdom 1
Vietnam 1

Sites per Study

Site_count Study_Count
1 1004
2 146
3 84
4 53
5 40
6 37
7 28
8 32
9 22
10 21
11 15
12 26
13 14
14 14
15 13
16 13
17 9
18 12
19 10
20 6
21 5
22 6
23 5
24 10
25 5
26 3
27 3
28 2
29 6
30 5
31 1
32 5
33 6
34 4
35 2
36 3
37 5
39 3
40 3
41 1
42 2
43 1
44 3
46 3
47 4
48 2
49 3
51 2
52 2
54 1
55 1
56 1
57 5
58 2
60 1
61 1
62 1
63 1
65 3
66 2
67 4
70 1
73 2
74 2
75 1
76 1
77 2
78 2
79 1
82 1
83 2
86 2
87 1
88 1
90 1
91 1
95 1
98 2
99 1
102 1
106 1
107 1
110 1
111 2
115 1
116 1
117 1
127 2
129 1
130 1
140 1
145 1
151 1
152 1
154 3
155 2
160 1
162 1
167 1
171 2
175 1
179 1
188 1
211 1
213 1
221 1
223 1
232 1
235 1
236 1
240 1
251 1
255 1
272 1
283 1
301 1
466 1
683 1
709 1
763 1
963 1
1328 1

Phase

Phase Study_Count
Phase 2 586
N/A 526
Phase 1 223
Phase 3 211
Phase 1/Phase 2 162
Phase 4 50
Phase 2/Phase 3 31
Early Phase 1 12

Number of Arms

Number_of_Arms Count_of_Studies
1 544
2 758
3 148
4 76
5 14
6 8
7 4
8 5
9 3
10 1
12 2
14 1
18 1
24 1
37 1
NA 234

Number of Updates

Count of Versions Count of Studies
1 146
2 199
3 179
4 179
5 151
6 122
7 80
8 66
9 84
10 69
11 71
12 44
13 40
14 30
15 26
16 23
17 26
18 17
19 12
20 13
21 11
22 10
23 8
24 6
25 5
26 14
27 8
28 8
29 5
30 7
31 5
32 9
33 9
34 8
35 4
36 3
37 1
38 4
39 6
40 1
41 6
42 3
43 7
44 3
45 2
46 1
47 3
48 3
49 3
50 1
52 2
55 1
56 1
57 1
58 1
59 2
63 1
66 2
67 2
68 2
69 2
71 1
74 4
75 1
77 1
78 2
80 2
83 2
84 1
85 2
87 1
88 1
89 1
90 1
91 1
92 1
93 3
94 1
95 1
96 1
97 1
98 1
99 1
100 1
101 1
105 1
115 1
124 1
125 1
154 1
182 1
289 1
296 1
683 1
881 1

Update History Change Type

Change Type Count_of_Changes Count_of_Studies ratio
Study Status 20246 1655 12.233233
Contacts/Locations 9357 1445 6.475433
Recruitment Status 2648 1447 1.829993
Study Design 2118 1178 1.797963
Arms 1956 867 2.256055
Interventions 1956 867 2.256055
None (earliest Version on record) 1801 1801 1.000000
Eligibility 1626 815 1.995092
Study Identification 1532 778 1.969152
Outcome Measures 1527 823 1.855407
Sponsor/Collaborators 1296 817 1.586291
Study Description 1296 721 1.797503
Oversight 806 640 1.259375
Conditions 786 477 1.647799
References 590 326 1.809816
More Information 381 145 2.627586
Results 214 214 1.000000
IPDSharing 203 181 1.121547
Baseline Characteristics 95 82 1.158537
Reported Adverse Events 79 71 1.112676
Results Submission Events 79 79 1.000000
Participant Flow 67 59 1.135593
Documents 43 41 1.048780

Enrollment Metrics by Phase

Measure Early.Phase.1 N.A Phase.1 Phase.1.Phase.2 Phase.2 Phase.2.Phase.3 Phase.3 Phase.4
Min. 25.000 4.000 1.0000 5.00000 2.0000 26.000 20.00 20.00
1st Qu. 97.500 60.000 18.0000 30.00000 35.7500 142.000 233.50 40.00
Median 493.500 201.000 28.0000 49.00000 56.0000 333.000 463.00 77.00
Mean 1577.583 3851.517 44.8972 94.20645 107.0779 1098.645 1503.93 402.36
3rd Qu. 1406.500 622.000 48.0000 93.00000 100.2500 541.000 820.00 200.00
Max. 8140.000 206721.000 350.0000 1549.00000 6452.0000 10838.000 95000.00 10000.00

Trial Group Type

group_type Group_Count
Experimental 2019
Active Comparator 650
NA 234
No Intervention 188
Placebo Comparator 142
Other 139
Sham Comparator 10

Intervention Model

intervention_model Study_Count
Parallel Assignment 899
Single Group Assignment 695
NA 105
Crossover Assignment 37
Sequential Assignment 36
Factorial Assignment 29

Primary Purpose

primary_purpose Study_Count
Treatment 1211
Prevention 155
Screening 120
Diagnostic 101
Supportive Care 84
Health Services Research 55
Other 37
NA 23
Basic Science 12
Device Feasibility 2
Educational/Counseling/Training 1

Observational Studies

Studies by Country

Country Study_Count
United States 108
China 39
NA 33
France 30
Italy 20
United Kingdom 20
Canada 18
United States|Canada 11
Belgium 10
Germany 10
Sweden 10
Korea, Republic of 9
Taiwan 9
Netherlands 7
Denmark 6
Hong Kong 6
Austria 4
Hungary 4
Ireland 4
Israel 4
Spain 4
Greece 3
Norway 3
Croatia 2
Egypt 2
Japan 2
Lebanon 2
Nigeria 2
Poland 2
Serbia 2
Slovakia 2
Switzerland 2
Turkey 2
United States|Germany 2
United States|Puerto Rico 2
Argentina 1
Argentina|Austria|Belgium|Croatia|Czechia|France|Germany|Greece|Hungary|Ireland|Italy|Netherlands|Portugal|Slovenia|Spain|Sweden|Switzerland|United Kingdom 1
Australia 1
Australia|Canada 1
Austria|Belgium|France|Germany|Greece|Italy|Netherlands|Poland|Romania 1
Austria|Belgium|Germany 1
Austria|Belgium|Germany|Italy 1
Belgium|Cyprus|France|Germany|Greece|Italy|Poland|Portugal|Spain|Sweden|Switzerland 1
Belgium|Czech Republic|Denmark|France|Germany|Italy|Netherlands|Spain|Sweden 1
Brazil 1
Czechia 1
Finland 1
France|Germany|United Kingdom 1
Germany|Hungary 1
Germany|Ireland|Spain 1
Germany|Serbia|United Kingdom 1
Ireland|Germany 1
Italy|Spain 1
Latvia|Lithuania 1
Puerto Rico 1
Russian Federation 1
South Africa 1
Spain|United Kingdom|Croatia|Denmark|Finland|France|Germany|Greece|Italy|Portugal 1
Thailand 1

Sites per Study

Site_count Study_Count
1 286
2 27
3 18
4 6
5 13
6 9
7 3
8 2
9 5
10 3
11 1
12 2
13 2
14 3
15 1
17 2
18 1
19 2
20 1
21 1
22 2
23 2
24 1
26 1
27 1
29 1
31 1
32 2
33 1
39 2
40 1
41 1
43 1
47 1
50 1
59 1
65 1
70 1
72 1
73 1
84 1
100 1
113 1
118 1
126 1
143 1
166 1
185 1

Number of Updates

Count of Versions Count of Studies
1 80
2 69
3 58
4 38
5 31
6 13
7 14
8 12
9 9
10 11
11 9
12 10
13 5
14 5
15 4
16 3
17 1
18 3
20 1
21 2
22 2
24 1
25 2
26 1
27 2
28 2
30 1
31 2
32 1
33 1
36 1
37 1
41 1
43 1
44 1
45 1
47 1
53 1
54 1
55 2
56 1
57 1
58 1
62 1
64 2
65 1
68 1
69 1
70 1
71 1
75 1
76 1
85 1
92 1
164 1

Update History Change Type

Change Type Count_of_Changes Count_of_Studies ratio
Study Status 3452 340 10.152941
Contacts/Locations 1244 271 4.590406
None (earliest Version on record) 420 420 1.000000
Recruitment Status 417 253 1.648221
Study Design 414 233 1.776824
Study Description 278 121 2.297521
Eligibility 252 145 1.737931
Outcome Measures 186 138 1.347826
Sponsor/Collaborators 176 121 1.454546
Groups 175 107 1.635514
Interventions 175 107 1.635514
Study Identification 160 102 1.568628
Conditions 96 60 1.600000
Oversight 93 82 1.134146
References 75 47 1.595745
IPDSharing 29 24 1.208333
Results 18 18 1.000000
More Information 5 5 1.000000
Documents 2 2 1.000000
Results Submission Events 2 2 1.000000
Baseline Characteristics 1 1 1.000000
Reported Adverse Events 1 1 1.000000

Enrollment Metrics

Measure Observational
Min 1.00
1st Qu 81.00
Median 253.00
Mean 19236.25
3rd Qu 795.75
Max 4710504.00

Observation Model

observational_model Study_Count
Cohort 236
Case-Only 64
Case-Control 42
Other 25
Case Control 20
NA 17
Ecologic or Community 7
Family-Based 7
Case-Crossover 2

Time Perspective

time_perspective Study_Count
Prospective 324
Retrospective 50
Cross-Sectional 21
Other 15
NA 10

Registries

Studies by Country

Country Study_Count
China 4
Italy 4
Spain 4
Denmark 3
Austria 2
France 2
NA 2
Argentina 1
Belgium 1
Czechia 1
Egypt 1
Germany 1
Korea, Republic of 1
Netherlands 1
Norway 1
Romania 1
Sweden 1
Taiwan 1
United Kingdom 1
United States 1
United States|Canada 1

Sites per Study

Site_count Study_Count
1 28
2 1
4 1
9 1
15 1
17 1
30 1
56 1

Number of Updates

Count of Versions Count of Studies
1 12
2 9
3 6
4 1
5 5
8 1
20 1

Update History Change Type

Change Type Count_of_Changes Count_of_Studies ratio
Study Status 70 23 3.043478
None (earliest Version on record) 35 35 1.000000
Contacts/Locations 34 15 2.266667
Recruitment Status 19 13 1.461539
Study Design 15 11 1.363636
Study Description 10 9 1.111111
Groups 8 7 1.142857
Interventions 8 7 1.142857
Outcome Measures 6 4 1.500000
References 5 4 1.250000
Study Identification 5 5 1.000000
Eligibility 3 3 1.000000
Conditions 2 2 1.000000
IPDSharing 2 2 1.000000
Results 1 1 1.000000
Sponsor/Collaborators 1 1 1.000000

Enrollment Metrics

Measure Registries
Min 36.000
1st Qu 145.500
Median 500.000
Mean 3030.771
3rd Qu 1500.000
Max 35000.000

Registry Model

observational_model Study_Count
Cohort 26
Case-Control 3
Case-Only 3
Other 2
Case Control 1

Time Perspective

time_perspective Study_Count
Prospective 34
Other 1

Follow-up

target_duration Study_Count
2 Years 5
3 Years 5
6 Months 5
1 Year 3
10 Years 3
12 Months 3
1 Day 2
5 Years 2
1 Month 1
1 Week 1
18 Months 1
3 Weeks 1
30 Days 1
4 Years 1
50 Years 1